someone who stumbles over themselves on a regular basis. Someone who is not well dressed, or shaven. Has money, but no one knows why. Similar to the character in Sienfeld. Someone who doesn't really have a job. Eager to trip, spit, snort, and act out in a foolish mannor.

Spock totally just pulled a cosmo kramer. He totally just tripped and fell on the ground. He fell on a huge pile of dog shit and just kept on walking like nothing happened.

Tim just cosmo kramerd. He ate his own bugers and thought no one saw it.